CN1300363C - 用做汽轮机转子的耐热钢材料 - Google Patents

用做汽轮机转子的耐热钢材料 Download PDF

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CN1300363C
CN1300363C CNB2005100213812A CN200510021381A CN1300363C CN 1300363 C CN1300363 C CN 1300363C CN B2005100213812 A CNB2005100213812 A CN B2005100213812A CN 200510021381 A CN200510021381 A CN 200510021381A CN 1300363 C CN1300363 C CN 1300363C
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turbine rotor
weight percent
steam turbine
steel material
temperature
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CN1730704A (zh
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杨功显
范华
钟杰
胡维成
江雷
蒋新亮
王月乔
邓林涛
张明康
龚惠昌
游卫
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DEC Dongfang Turbine Co Ltd
Erzhong Deyang Heavy Equipment Co Ltd
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CHINA SECOND HEAVY MACHINERY GROUP CO
DONGFANG STEAM TURBINE PLANT
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Abstract

本发明公开了一种用做汽轮机转子的耐热钢材料，其特征是含如下重量百分比的元素：C 0.10-0.15；Mn 0.30-0.60；Cr 9.80-10.50；Mo 0.90-1.10；V 0.20-0.25；Nb 0.04-0.10；W 0.90-1.10；N 0.04-0.10；余量是Fe及杂质。工艺方法是真空冶炼、真空浇铸成钢坯。用该材料制做的汽轮机转子具有优良的高温持久性和蠕变性，在温度600℃/600℃，压力24-28MPa的工况下，其力学性能完全达到设计要求。

Description

用做汽轮机转子的耐热钢材料
技术领域
本发明涉及汽轮机转子，尤其涉及该转子的材料。
背景技术
随着汽轮机制造技术的发展，单机容量越来越大，性能越来越好，主要技术手段之一是提高蒸汽的压力和温度，亚临界、超临界汽轮机的蒸汽参数分别从温度538℃/538℃、压力17MPa提高到温度600℃/600℃、压力24-28MPa，而现有的超临界、亚临界超临界汽轮机转子使用的材料是30Cr1Mo1V耐热钢或1Cr11Mo1VNbN耐热钢，其高温持久性能和蠕变性能已不能满足上述工况的要求。
发明内容
本发明要解决的技术问题，是提供一种用做亚临界、超临界汽轮机转子的耐热钢材料，该材料的力学性能满足上述要求。其技术方案是：
一种用做汽轮机转子的耐热钢材料，其特征在于含如下重量百分比的元素：
C  0.10-0.15；Mn 0.30-0.60；Cr  9.80-10.50；
Mo 0.90-1.10；V  0.20-0.25；Nb  0.040-0.100；
W 0.90-1.10；N 0.04-0.10；余量是Fe及杂质。
所述杂质中：S≤0.012；P≤0.012；Cu≤0.15；Al≤0.010；Sn≤0.015；Sb≤0.0015；As≤0.020；Si≤0.08；Ni≤0.60；均为重量百分比。
H2≤1.0PPM；O2≤30PPM；N2≤100PPM。
上述耐热钢的冶炼方法，包括步骤：
(1)、取所需化学元素，在电炉中真空熔炼，熔炼过程中调节化学元素的含量，使其重量比符合设计要求，控制杂质含量在设计允许的范围内。
(2)、采用真空浇铸将合金溶液浇铸成钢坯。
(5)、进行力学性能试验，试验技术要求如下：
一、室温拉伸试验
拉伸强度            σb≥840N/mm2；
屈服强度            σ0.2≥670N/mm2；
伸长率              δ≥14％；
断面收缩率          ψ≥30％；
冲击功              AKv≥24J；
脆性面积转变温度    FATT50≤+80℃。
二、高温持久试验
试验条件：温度600℃；应力196N/mm2；
光滑试样：断裂时间T＞100小时；持久塑性≥10％；
缺口试样：T缺口/T光滑≥1。
采用上述材料及相应工艺方法制备的汽轮机转子材料，经下述试验表明，具有优良的高温持久性和蠕变性，在温度600℃/600℃，压力24-28MPa的工况下，其力学性能完全达到设计要求。试验结果如下表：
σ0.2 σb δ ψ Akv   650℃-186MPa短时持久
  (MPa)   (MPa)   (％)   (％)   (J)   断裂时间(Hr)
  750   915   17   61   37   100.2
  755   910   18   59   41   120.4
  735   910   18   59   41   67.3
具体实施方式
实施本发明包括如下步骤：
取所需化学元素，在碱式电炉中真空熔炼，熔炼过程中调节化学元素的含量，使其重量百分比如下：
  C   Mn   Cr   Mo   V   Nb   W   N
 实施例1实施例2实施例3实施例4实施例5   0.100.130.140.150.11   0.320.380.420.470.58   9.809.859.909.9810.30   0.910.971.001.051.10   0.210.220.230.240.25   0.0450.0550.0700.0800.095   0.900.950.991.051.10   0.0450.0550.0700.0850.090
并控制杂质含量符合如下要求：
S≤0.012；  P≤0.012； Cu≤0.15；Al≤0.010；Sn≤0.015；
Sb≤0.0015；As≤0.020；Si≤0.08；Ni≤0.60； 均重量百分比。
H2≤1.0PPM；O2≤30PPM；N2≤100PPM。
取样分析合格后，采用真空浇铸将合金溶液浇铸成钢坯。
使用本材料制造汽轮机转子，其加工工艺如下：
一、将钢坯热锻成汽轮机转子型坯，使其形状、尺寸符合工艺设计要求，并消除内部缺陷。
二、将汽轮机转子型坯进行热处理，步骤及工艺参数如下：
(1)、淬火处理  加热温度1100℃；时间40小时；
(2)、一次回火处理  加热温度600℃；时间50小时；
(3)、二次回火处理  加热温度650℃；时间50小时。
三、型坯检验
进行汽轮机转子型坯力学性能试验，包括室温拉伸试验和高温持久试验，试验指标符合设计要求即为合格。
四、金加工
在机床上切削加工，使其形状、尺寸符合设计要求。

Claims (1)

1.一种用做汽轮机转子的耐热钢材料，其特征在于，所述耐热钢材料的化学组成为：
C 0.10～0.15(重量百分比)；     Mn 0.30～0.60(重量百分比)；
Cr 9.80～10.50(重量百分比)；   Mo 0.90～1.10(重量百分比)；
V 0.20～0.25(重量百分比)；     Nb 0.040～0.100(重量百分比)；
W 0.90～1.10(重量百分比)；     N 0.04～0.10(重量百分比)；
余量是Fe及杂质；
所述杂质为：
S≤0.012(重量百分比)；         P≤0.012(重量百分比)；
Cu≤0.15(重量百分比)           Al≤0.010(重量百分比)；
Sn≤0.015(重量百分比)；        Sb≤0.0015(重量百分比)；
As≤0.020(重量百分比)；        Si ≤0.08(重量百分比)；
Ni ≤0.60(重量百分比)；
H2≤1.0PPM；    O2≤30PPM；    N2≤100PPM。
CNB2005100213812A 2005-07-31 2005-07-31 用做汽轮机转子的耐热钢材料 Active CN1300363C (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101525727B (zh) * 2009-04-22 2011-02-09 四川六合锻造股份有限公司 用做超超临界汽轮机叶片或螺栓的耐热钢材料及其制备方法
CN101804494B (zh) * 2010-03-31 2012-01-11 哈尔滨汽轮机厂有限责任公司 超超临界12%Cr钢高中压转子推力盘堆焊工艺方法
CN104831160B (zh) * 2015-03-26 2016-09-28 哈尔滨汽轮机厂有限责任公司 用于630℃超超临界汽轮机叶片的含Re钢材料及其制造方法
CN105861945B (zh) * 2016-05-31 2018-03-02 舞阳钢铁有限责任公司 一种高铬的铬钼钢板及其生产方法

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JPH1036944A (ja) * 1996-07-19 1998-02-10 Mitsubishi Heavy Ind Ltd マルテンサイト系耐熱鋼
JPH10251809A (ja) * 1997-03-18 1998-09-22 Mitsubishi Heavy Ind Ltd 高靭性フェライト系耐熱鋼
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JP2002348642A (ja) * 2001-05-25 2002-12-04 Toshiba Corp 耐熱鋼
CN1406287A (zh) * 2000-12-26 2003-03-26 株式会社日本制钢所 高Cr铁素体系耐热钢
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Publication number Priority date Publication date Assignee Title
US5961284A (en) * 1995-08-25 1999-10-05 Hitachi, Ltd. High strength heat resisting cast steel, steam turbine casing, steam turbine power plant and steam turbine
JPH09287402A (ja) * 1996-04-22 1997-11-04 Hitachi Ltd 蒸気タービン用ロータシャフト及び蒸気タービン発電プラントとその蒸気タービン
JPH1036944A (ja) * 1996-07-19 1998-02-10 Mitsubishi Heavy Ind Ltd マルテンサイト系耐熱鋼
JPH10251809A (ja) * 1997-03-18 1998-09-22 Mitsubishi Heavy Ind Ltd 高靭性フェライト系耐熱鋼
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JP2002348642A (ja) * 2001-05-25 2002-12-04 Toshiba Corp 耐熱鋼

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